Apparatus for measuring the velocity and inclination of the wind.



H. GERDIEN & AR. HOLM. APPARATUS FOR MEASURING THE VELOCITY ANDINGLINATION or THE WIND.

APPLICATION FILED MAY 12, 1913.

1,077,521. Patented Nov; 4, 1913.

omen STATES PATENT OFF-E,

ms ennnmn, or natnnsnn, nnnm'n, AND anemia HOLM, or cminno'r'rnn- BUBG,GERMANY, ASSIGNOBS T9 SIEMENS Q5 HALSKE 4. Ga, OF BERLIN, GERMANY,

A CORPORATION OF GERMANY.

armmn'rus ron mnasimmc m v'nnocrrir AND INCLINATION or THE WIND.

Specification of Letters Patent.

. ap ie flou i l 87 3 fi 'fl l' 206- Patented NOV. 4, 1913.

To all whom it may concern:

Be it known that we, Hans Gnnnmn and RAGNAR HOLM, citizens of theGermanEmpire and of the Kingdom of Sweden, re ipectively, andrespectively residing at I alensee, near Berlin, and Charlottenburg,Germany, have invented certain new and useful Improvements in Apparatusfor velocity of the wind.

According to our invention we employ two members or dam-bodies, one ofwhich can adjust itself automatically about a vertical axis in thedirection of the wind and whose indications are independent of theinclination and direction of the wind, while the indications of thesecond are dependent on the inclination of the wind.. The differences ofpressure at the two members are imparted in known manner to indicatinginstruments, for example manometers or, as in the present example, toelectrical indicating instruments of known kind.

One illustrative embodiment of our invention is represented byway ofexample in the accompanyingdrawing, wherein Figure 1 is a perspectiveview showing a preferred form of our apparatus; Fig. 2 is a verticaltransverse section .on an enlarged scale through the member 3 whichindicates the velocity of the wind independently of the inclination anddirection of the wind,

Fig. 3 is a vertical section on an enlarged scale through the dam body 4(Fig. 1) which indicates the velocity of the wind in dependence of theinclination of' the wind, and Fig. i is a horizontal sectional view ofthe apparatus on the line X-X Fig. 1, the

member 19 and the wind-vane 2 havingbeen removed.

Referring to the drawing, a frame 26 which supports the several elementsof the apparatus, is rotatably mounted on a column 1 and can be placedin the direction of the wind by the wind-vane 2 fastened to the frame.The one dam-body 3 is for indicatthe velocity of the wind independentlyof its inclination and direction, and the other dam-body 4 is forindicating the velocity of the wind in dependence on the inclination ofthe wind. The dam-body 3 consists of a round plate 22 having wide rims23, 23 at both sides, and pipes 5 and 6 disposed on its two surfaces asshown. These pipes have openings 7 and 8 facing plate 22, whicharrangement tends to prevent impurities from entering into the pipes. Aratio of the width of the rim on each side to the diameter of the plate22 of 1:6 has been found. suitable, because inclinations of the wind arethen without influence on the indications. The second dam-body 4, whoseindications are dependent on the inclination of the wind, preferably hasthe contour of a so-oalled stream line. By stream line is understoodthat path along which the air travels when impacting on and'fiowing pasta body without eddies being produced. The clam-body 4 is hollow and hasa horizontal partition 9, dividing the body into two compartments 25, afront limiting surface 10 and the somewhat recessed guide surfaces 11and 12. Thesurfaces 11 and 12 deviate somewhat, it is true, from thetheoretical form of the stream line, but this has not been foundinjurious to the action of the apparatus. In addition, owing to surfaces11 and 12 nnderlapping the front wall 10, the entering of impurities andrain particularly into the upper compartment of the dam-body isprevented. By the edges of surfaces 11 and 12 and the respective edgesof surface 10, openings 24 are formed which lead into the interior ofbody 4, one into each compartment 25. The pipes 13 and 14: which lead tothe indicating device are connected to the two compartments 25 as shownin Fig. 3.

The indicating devices used in connection with the hereindescribedapparatus are electrical measuring instruments 17 and 18 of known form,in which the air flowing through them conducts away the heat of anelectrically heated wire, so that the cooling and with it the change ofthe electrical resistance of the wire is a measure of the velocity ofthe wind.

The differences of pressure at the member 3 are transmitted by the pipes5 and G and the hollow columns 15 and 16 to the instrument 17 while thedifierences of pressure of the member 4 are transmitted by the pipes 13and 14 to the measuring instrument 18-.

The indications of these instruments are transmitted electrically byconductors in the column 1 to reading or recording devices.Consequently, the described apparatus may beilaced at anydesiredelevation in the air only short conductors between the members 3and i and the indicating instruments 17 and 18 are necessary, while thereadings direction of the wind is hori zontal only the instrument 17connected to the member 3 gives indications, because the wind flowingpast the member 4- roduces equal pressures on both sides thereo so thatthe indicating instrument 18 is not influenced. When the wind comessla-ntingly from above, however, for example, a weaker suction action isproduced at the up er opening 24 of the member 4 than at t e lower. Thisdifference of pressure is transmitted through pipes 13, 14; to theindicating instrument 18 and to the'reading or recording device, I bedetermined from the indications of the indicating instrument 18 when thevelocity has simultaneously been ascertained from the indications of theindicating instrument 17. y

We claim 1. In apparatus for measuring the velocity and inclination ofthe wind, the combination with a support, of a frame rotatable thereon,a wind-vane on the frame, a member for indlcatin the velocity of thewind independently of the inclination of the wind mounted on the frame,a member for indicating the velocity of "the wind in dependence on theinclination of the wind carried by the frame, an indicating instrumentop-,

eratively connected to the former member, and an mdicating Instrumentoperatively 7 connected to the latter member.

. 2. In apparatus for measuring the velocity and inclination of thewind, the combiindicating. the velocit a stream and the inclination ofthe wind cannation with a support, of a frame rotatable a wind-vane onthe frame, a mem thereon, her having wide rims on bothsides thereof forindicatin the'velocity of the wind independently o the. inclination ofthe wind and mounted onthe frame a member for of the wind in dependenceon the inc ination of the wind carried by the frame, an indicatinginstrument operatively connected to the former member, and an indicatinginstrument operatively connected to the atter member.

3. In apparatus ity and inclination of the wind, the combination with asupport, of a frame rotatable thereon, a wind-vane on the frame, a memher for indicating the velocity of the wind independently of theinclination of the wind and mounted on the frame, a member of a shapecorresponding as nearly as possible to indicating instrument operativelyconnected to the former member, and an mdicating in- Y strumentoperatively connected to the latter member.

4. In apparatus for measuring the veloo-- ity and inclination of thewind, the combination with a, column, of a frame horizontally rotatablethereon, a wind-vane-on the frame, a vertical dam-body, two conduitsmounted on the frame carrying the dambody vertically above the columnand openingat the two sides of the dam-body, and an indicatinginstrument connected to said conduits; a horizontal dam-body, twoconduits carrying the latter dam-body laterally of the column andopening at the upper and lower sides of the horizontal dam-body, and anindicating instrument connected to the latter two conduits. V

In testimony whereof we have signed our names to this specification inthe presence of line for indicating the velocity of the wind independenceon the inclination, of the wind and carriedby the frame, an

for measuring the veloc-

